iommu/amd: Allocate data structures to keep track of irq remapping tables
To easily map device ids to interrupt remapping table entries a new lookup table is necessary. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
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05152a0494
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0ea2c422bc
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@ -183,6 +183,12 @@ u16 *amd_iommu_alias_table;
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*/
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struct amd_iommu **amd_iommu_rlookup_table;
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/*
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* This table is used to find the irq remapping table for a given device id
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* quickly.
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*/
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struct irq_remap_table **irq_lookup_table;
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/*
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* AMD IOMMU allows up to 2^16 differend protection domains. This is a bitmap
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* to know which ones are already in use.
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@ -1532,9 +1538,13 @@ static struct syscore_ops amd_iommu_syscore_ops = {
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static void __init free_on_init_error(void)
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{
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free_pages((unsigned long)irq_lookup_table,
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get_order(rlookup_table_size));
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if (amd_iommu_irq_cache) {
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kmem_cache_destroy(amd_iommu_irq_cache);
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amd_iommu_irq_cache = NULL;
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}
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amd_iommu_uninit_devices();
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@ -1687,6 +1697,12 @@ static int __init early_amd_iommu_init(void)
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0, NULL);
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if (!amd_iommu_irq_cache)
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goto out;
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irq_lookup_table = (void *)__get_free_pages(
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GFP_KERNEL | __GFP_ZERO,
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get_order(rlookup_table_size));
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if (!irq_lookup_table)
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goto out;
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}
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ret = init_memory_definitions(ivrs_base);
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@ -175,6 +175,7 @@
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#define DEV_ENTRY_EX 0x67
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#define DEV_ENTRY_SYSMGT1 0x68
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#define DEV_ENTRY_SYSMGT2 0x69
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#define DEV_ENTRY_IRQ_TBL_EN 0x80
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#define DEV_ENTRY_INIT_PASS 0xb8
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#define DEV_ENTRY_EINT_PASS 0xb9
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#define DEV_ENTRY_NMI_PASS 0xba
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@ -337,6 +338,14 @@ extern bool amd_iommu_iotlb_sup;
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#define MAX_IRQS_PER_TABLE 256
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#define IRQ_TABLE_ALIGNMENT 128
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struct irq_remap_table {
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spinlock_t lock;
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unsigned min_index;
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u32 *table;
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};
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extern struct irq_remap_table **irq_lookup_table;
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/* Interrupt remapping feature used? */
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extern bool amd_iommu_irq_remap;
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